MitchTvd

I have a bin of hundreds if not thousands of bionicle pieces and I sometimes like to rebuild sets that I've broken down for parts. Many bionicle sets use the same pieces but say If I use black hand pieces from Antroz and use them to rebuild Tahu, does that affect the value? Or because nobody knows, it doesn't? please inform

I was just looking through my bin of hundreds of bionicle pieces, and found some incomplete sets. When i pulled out nokama metru, I noticed the left knee and ankle were pretty stiff. So I took some white lithium grease and applied a small amount to the ball part of the joint. Now it's less stiff, but vibrates when I bend it. Was this a bad Idea?